We built a 20 channel, 200 GHz, fully reconfigurable optical
add-/drop multiplexer with integrated variable optical attenuators
and power monitor diodes. A single planar lightwave circuit chip
contains demultiplexer, switch array, attenuators and
multiplexers. It also serves as an "optical motherboard" for a
hybrid, flip-chip assembly containing four 10-channel photo
detector arrays. A thermal management concept which considers both
microscopic and macroscopic aspects of the device was developed.
The final device exhibits an insertion loss of 9 dB from "in"-
to "through"-port, a 1 dB bandwidth of >50 GHz and switch
extinction ratios in excess of 40 dB.
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